Computed tomography (CT)-measured psoas muscle thickness standardized for height (PMTH) has emerged as a promising predictor of mortality. The study aimed to investigate whether PMTH could accurately predict mortality in patients undergoing hemodialysis. We examined 207 patients (mean age: 63.1 years; men: 66.2%) undergoing hemodialysis for more than 6 months in hospital affiliated clinic. PMTH was calculated at the L3 vertebra level using CT. Patients were divided according to the PMTH cut-off points: 8.44 mm/m in women and 8.85 mm/m in men; thereafter, they were combined into low and high PMTH groups. PMTH was independently correlated with the simplified creatinine index (β = 0.213, P = 0.021) and geriatric nutritional risk index (β = 0.295, P < 0.0001) in multivariate regression analysis. During a median follow-up of 3.7 (1.8–6.4) years, 76 patients died, including 41 from cardiovascular causes. In the multivariate Cox regression analysis, low PMTH (adjusted hazard ratio, 2.48; 95% confidence interval, 1.36–4.70) was independently associated with an increased risk of all-cause mortality. The addition of binary PMTH groups to the baseline risk model tended to improve net reclassification improvement (0.460, p = 0.060). In conclusion, PMTH may be an indicator of protein energy wasting and a useful tool for predicting mortality in patients undergoing hemodialysis.

计算机断层扫描 (CT) 测量的腰大肌厚度标准化高度 (PMTH) 已成为有希望的死亡率预测指标。该研究旨在调查 PMTH 是否可以准确预测接受血液透析的患者的死亡率。我们检查了 207 名在医院附属诊所接受血液透析超过 6 个月的患者（平均年龄：63.1 岁；男性：66.2%）。使用 CT 在 L3 椎骨水平计算 PMTH。患者根据 PMTH 分界点进行划分：女性为 8.44 mm/m，男性为 8.85 mm/m；此后，它们被合并为低和高 PMTH 组。PMTH 与简化肌酐指数（β = 0.213，P  = 0.021）和老年营养风险指数（β = 0.295，P < 0.0001) 在多元回归分析中。在中位随访 3.7 (1.8-6.4) 年期间，76 名患者死亡，其中 41 名死于心血管原因。在多变量 Cox 回归分析中，低 PMTH（调整后的风险比，2.48；95% 置信区间，1.36-4.70）与全因死亡风险增加独立相关。将二元 PMTH 组添加到基线风险模型倾向于提高净重分类改进（0.460，p = 0.060）。总之，PMTH 可能是蛋白质能量浪费的指标，也是预测接受血液透析患者死亡率的有用工具。